5aca77977b65a56f73a226e7fc52a84d22963326b54b24a01c72301db63b31fc

Analysis

max time kernel
94s
max time network
146s
platform
windows10-2004_x64
resource
win10v2004-20241007-en
resource tags

arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
submitted
22-01-2025 15:53

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General

Target

JaffaCakes118_0f279f6b5a37f17af18161ce5bad3a1d.dll
Size

436KB
MD5

0f279f6b5a37f17af18161ce5bad3a1d
SHA1

b160925583de432c9946d7949947869554a48957
SHA256

5aca77977b65a56f73a226e7fc52a84d22963326b54b24a01c72301db63b31fc
SHA512

eeefcc3a7a0110ae039431b60848d2a9d86794c903e14ebfc38f8ba7576edc4318f9fec9f6bb4e18292aaaeaed4def0f6ac4d4ad1eafa63c1d5d5a1f368830dc
SSDEEP

6144:LcV9z83OtqxnEYmt3NEnvfF+Tbmbw6An8FMciFMNrb3YgxxpbCAOxO2ElvlEjND7:Loz83OtIEzW+/m/AyF7bCrO/EjNGrUP

Score

7^/10

discovery upx

Malware Config

Signatures

Executes dropped EXE 1 IoCs

pid	Process
1440	rundll32Srv.exe

Drops file in System32 directory 1 IoCs

description	ioc	Process
File created	C:\Windows\SysWOW64\rundll32Srv.exe	rundll32.exe

UPX packed file 3 IoCs

Detects executables packed with UPX/modified UPX open source packer.

upx

resource	yara_rule
behavioral2/files/0x000c000000023b24-3.dat	upx
behavioral2/memory/1440-5-0x0000000000400000-0x0000000000441000-memory.dmp	upx
behavioral2/memory/1440-8-0x0000000000400000-0x0000000000441000-memory.dmp	upx

Program crash 2 IoCs

pid	pid_target	Process	procid_target
3460	544	WerFault.exe	82
2932	1440	WerFault.exe	83

System Location Discovery: System Language Discovery 1 TTPs 2 IoCs

Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

discovery

System Language Discovery

T1614.001

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	rundll32.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	rundll32Srv.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 5096 wrote to memory of 544	5096	rundll32.exe	82
PID 5096 wrote to memory of 544	5096	rundll32.exe	82
PID 5096 wrote to memory of 544	5096	rundll32.exe	82
PID 544 wrote to memory of 1440	544	rundll32.exe	83
PID 544 wrote to memory of 1440	544	rundll32.exe	83
PID 544 wrote to memory of 1440	544	rundll32.exe	83

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_0f279f6b5a37f17af18161ce5bad3a1d.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:5096
- C:\Windows\SysWOW64\rundll32.exe
  rundll32.exe C:\Users\Admin\AppData\Local\Temp\JaffaCakes118_0f279f6b5a37f17af18161ce5bad3a1d.dll,#1
  2⤵
  - Drops file in System32 directory
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:544
- - C:\Windows\SysWOW64\rundll32Srv.exe
    C:\Windows\SysWOW64\rundll32Srv.exe
    3⤵
    - Executes dropped EXE
    - System Location Discovery: System Language Discovery
    PID:1440
  - - C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -u -p 1440 -s 268
      4⤵
      Program crash
      PID:2932
- - C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -u -p 544 -s 608
    3⤵
    - Program crash
    PID:3460

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 440 -p 1440 -ip 1440
1⤵
PID:3292

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 416 -p 544 -ip 544
1⤵
PID:1104

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

System Location Discovery

T1614

System Language Discovery

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

C:\Windows\SysWOW64\rundll32Srv.exe

Filesize
94KB

MD5
f6736faa3126f64ed4a7109e40c47806

SHA1
0d50917f44d6e173bac24916c95343616dcbf18c

SHA256
bc0cb854888c155cbfed860a6546bea3c82db643df30437fe14d91194939a874

SHA512
29cc26cd4df360252917a5d913e5e4776b6d05061b464f09dbb33918491affdc15cac9e142a9227a48f27d26db1f8ee85bd3d417365d6fef9b2fd380e090efe5

Download Submit
memory/544-1-0x000000007C340000-0x000000007C3AE000-memory.dmp

Filesize
440KB

Download
memory/544-9-0x000000007C340000-0x000000007C3AE000-memory.dmp

Filesize
440KB

Download
memory/1440-6-0x0000000000490000-0x0000000000491000-memory.dmp

Filesize
4KB

Download
memory/1440-5-0x0000000000400000-0x0000000000441000-memory.dmp

Filesize
260KB

Download
memory/1440-8-0x0000000000400000-0x0000000000441000-memory.dmp

Filesize
260KB

Download